So I Bobby’d Ezekiel
There’s no mention of him as an Angel in the lore . However, there is mention of him as a prophet who had a vision of Lucifer’s fall. He was also later recognized as a saint, commemorated on the 21st of July. So as far as I can see, we’re at the mercy of the writers on this one. Still, if the lore is any indication, we should be in the clear.
Update: In Trussoni’s “Angelology” she used “Ezekeel” as one of the watchers sent by God to Earth prior to the Great Flood. His job was to watch over creation, living by the fringes of human civilization. He one day, along with the other angels, broke the pact between Heaven and Earth by having a human wife and subsequently, Nephilim children. He gave the women working knowledge of the clouds.
Archangels including Michael, Uriel, Raphael and Gabriel rounded up Ezekeel and his cohorts, trapping them in a ring of fire. The Watchers were banished underneath the Earth without air and light.
Now, that could explain our Zeke’s frayed wings.
BONUS ROUND: their belief in Dean and Castiel could just mean they approve of this Angel-Human union